<div class="container">
  <div class="row">
    <div class="center-form panel">
      <div class="panel-body">
        <button class="btn btn-block btn-foursquare" ng-click="vm.authenticate('authserver')">
          <i class="fa fa-foursquare"></i> Sign in with authserver
        </button>
        <button class="btn btn-block btn-github" ng-click="vm.authenticate('github')">
          <i class="ion-social-github"></i> Sign in with GitHub
        </button>
      </div>
    </div>
  </div>
</div>
